Coupling mechanism



Aug. 1931- 3 w. R. HUNGERFORD 1,820,703

' COUPLING MECHANISM 1 Filed Aug. 1, 1923 v 6&6? .7 J, I I

Patented Aug. 25, 1931' ",wA L LA oE R. noNoEiaFonn oF' :CI-IICAGO,nQLIivoIs, ,ASSIGNORQ BY; mnsnni ssrom MEN'rsJro. LEONIDAS n. woomwrr,or CHICAGO, rumors j '1 cour'L'mo IIMECILIANISMY My invention relates tomechanism for --"coupli'ngpiping sect ons and is of particular"=1Jservice in uniting sections that are employed to convey airunder-pressure, though the in- 5- vention isnot tobethuslimlted. 1f 7 5v The object ofthe-invention is to provide -a coupling which isgenerally of new and improved construction, may be manufactur- 1' edat-a low cost and is an improvementupon couplings of similarcharacterhere-Q tofore designed;

; scopic relation andhave shoulders that may I f have abuttingengagement, in which event, the collar surroundsboth of the piping sec-30 tions.- Thereare"preferably" two coupling links, each having end;portions placed be tween and-clear of one of the shoulders that areprovided upon the piping sectionsbe tween such'link end; portions. -Thecollar errand links havecooperating cam formations which force movementof thelinks into positionn The links 'are preferably'formed from- I leafsprings the ends of'which are desirably *curledinto the aforesaidlinkend ,por- 30 tions These links fflex under the influence oftheaforesaid'fcollar to hold the collar; h from being easily loosened.The'two pipe sections, when assembled by my device, are

15 freeto swivelwith respect to each other. i "The invention will bemore fully ex- .plained in connection with the accompanying clrawings'inwhich Fig. .lis a longitudinalsectional view .illustrating:the preferredem- 0 bodin ent of the invention; Fig. 2 is aview of --the' structureshown in Fig.1 with most of view partially in elevation and partiallyill-section, showing parts j of the device in P fi'l epuratedarelation;and Fig. 4 is aview t-thes'p'a'rts shown. in'elev'ation; Fig. 3;-is a f'hppuciit 'bn' 111ml h rm"1, 1925. Serial 1N0. 296311 The'invention' isexemplified in connection witha pair of piping sections 1 and2 which Vare arranged-in telescopic relation and have coacting-shoulder portions3 The piping section 2 hasashoulder portion L which faces the adj acentend of the piping section '1 to enabl'e'thebores ofboth pipi'ngeseo'tions to be of uniform diameter, ifdesired;

The piping section 1 is shown as beinginserted within a. rubber hose" 5which may lead to an airnozzle if the pipin'g is usedin connection withcleaning-apparatus employ; is

ingdust removing air. The piping section 2 "is shown as be ng screwed1nt'oap1p1ng section 6 which may, for example,;communlillustrating oneof the links and one {of the npiping sections in separated -relation.-

cate-with a vacuum creating deviceor an air pressure pump. A knurled-'col1ar"7'sur;. rounds bothof the piping 'sections and is screwed uponthe section 2' as shown, and as indicated at 8. Said pipings'ections land 2are formed withannular -grooves9*and 1O 7 which receive thegenerally cylindrical'end,

portions '11 and 12 of links 13. The inter mediate portions of: thelinksare "contained within' channels 14 that are formed in'the outer 'endofthe piping section 2 and communica te with said annular grooves. The

walls of said grooves thatli'e between the end portions 11 and'l2 ofthe-links constitute shoulders upon which these 'linkj end portionsoperate to keep thepiping sections in assembly but in a manner to keepthe'linlg, end portions 11 free inthe groove 9 receiv ing them to permitthe piping sections 1 and a 2 to swivel with respect to. each other.

' Theoam end of the collar 7 pressesupon the outer link endportions 11to cause th links to flex' sufficiently-Ito hold said collar easilyloosened. l The straight v from bein portions 0 the'links are pressed'bys'aidj'c'ollar upon the shoulders 15' to produce-they I describedflexing of the links "whereby the collar is held frombeingyeasilyturned."

The size of the link end portions 11 is such that they are not depressedby the collar 7 fully into the groove 9 and consequently the pipingsections 1 and 2 are sufliciently 5 free to permit them to swivel withrespect to each other.

It will be seen that I have provided a piping structure employing twopiping sections 1 and 2, a collar 7 screwed upon one 10 of the pipingsections, and one or more links tions 1, the other piping section 2shoulder 15 pertaining to each link 13 and against which an intermediateportion of the link is flexed 13, preferably formed of spring material,

each having end portions 11 and 12 respectively facing shoulders 9, 10',that are provided between said link end portions respectively upon thepiping sections, said collar having a cam formation 7 in engagement withone end portion 11 of each link to position this link end portion withrespect to the shoulder 9 upon one of the piping sec aving a adjacentlink is pressed by the aforesaid cam formation 7 upon the collar wherebysaid eulfieiently to hold the collar from being easily turned. Theshoulders 9, 10 are preferablyrelatively approachable to have a distancebetween them which is less than the effective distance between the linkend portions of the adjacent link, one

of said shoulders, the shoulder E) as illus ,trated, extending laterallybeyond the link ifooed thereby which is free of binding engagement withthe the shoulder 9', whereby relative swiveling .movement between saidpipingsections is permitted. The entire structure is such that no rivetholes need be provided in either of the piping sections, a smooth borein the pip-.

9 ing being thus afforded.

Changes may be made without from the invention.

Having thus described my invention, I claim:

1. In a coupling of the character described, the combination of a pairof piping sections having telescopically connected ends and adapted toswivel relatively to one another, one of said sections being providedwith an departing 0 external screw thread and having formed portion isdisposed within the channel and its other end projects beyond the end ofsaid one section, and a collar connected by an internal screw thread tothe external screw thread on the said one section so that i it isshiftable longitudinally by relative piping section 1 carryingrotationthereof, and embodying a cam formation at one of its ends adapted toengage the said other end of the link and operative when the collar isscrewed into place to force said other link-end into the groove, thechannelled part of the said one section being so formed that when thecollar is screwed into place the central portion of the link isdeflected or distorted outwardly and causes the said other link-end toengage the collar yieldably and hold the same against rotation. v

2. In a coupling of the character described, the combination of a pairof piping sections having telescopically connected ends and adapted toswivel relatively to one another, one of said sections being providedwith an external screw thread and a shoulder and having formed therein alongitudinally extending channel extending from the shoulder to the endof said one section, the other section having formed therein an annulargroove, a link for retaining the piping sections in connected relationformed of thin spring metal and compri-sing'a flat central portion andenlarged ends, said link having one end thereof positioned in abuttingrelation with the shonlder and being arranged so that the centralportion is dis posed in the channel and its other end projects beyondthe said one piping section, and a collar connected by an internal screwthread to the external screwthread on the said one section so that it isshiftable longitudinally by, relative rotation thereof, and embodying acam formation at one of its ends adapted to engage said other end of thelink and operative when the collar is screwed ,into place to force saidother link-end into M the groove, thechannellcd part of the said onepiping section being so formed that whenthe collar is screwed into placethe central portion of the link is deflected or distorted outwardly andcauses the ends to engage. the collar yieldably and hold the sameagainst rotation.-

3. In acouplingof the character described, the combination of a pair ofpiping sections having telescopically connected ends and adapted to;swivel relatively to one another,

one of said sections being provided with an external screw thread andhaving formed therein an annular groove and a longitudinally extendingchannel extending from the groove tothe end of said one section, theother section having formed therein an annular groove, a link forretaining the piping sections in connected relation formed offlat'spring metal and having the ends thereof bent into substantiallycylindrical form, said link having one end thereof disposed in the saidone piping section and being arranged so that the central portion ispositioned in the channel and its other end projects beyond said onesection, and a col- Y my name WALLACE it. HUNQEREORD.

beset lar connected, by' r a n -internal screw threads,v totheea'iterhafscmmthradd. on the said'one section so that it is shiftablelongitudinally by relative rotation thereof, and embodying a cam fo'rmation atone of its ends adapted to engage the said other end of thelink and o eratiye when the collar is screwed into p ace to'force said.other. link-end into the groove. I L Y In witness where'ofiIQherenntosubscribe

